/* ========================================
   グローバル設定
======================================== */
:root {
  /* カラーパレット - 青基調の厳格なデザイン */
  --primary-blue: #0047AB;
  --primary-blue-dark: #003380;
  --primary-blue-light: #1E5FCC;
  --secondary-blue: #2E5C8A;
  --accent-blue: #4A90E2;
  --dark-blue: #001F3F;
  --navy-blue: #0A2540;
  
  /* グレースケール */
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  
  /* ステータスカラー */
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #3B82F6;
  
  /* フォント */
  --font-ja: 'Noto Sans JP', sans-serif;
  --font-en: 'Inter', sans-serif;
  
  /* スペーシング */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* シャドウ */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-ja), var(--font-en);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--gray-50);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ========================================
   ヘッダー
======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--navy-blue) 100%);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 2px solid var(--primary-blue);
  box-shadow: var(--shadow-lg);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 900;
  color: white;
}

.logo i {
  color: var(--accent-blue);
  font-size: 1.8rem;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav a {
  color: var(--gray-200);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  font-size: 0.95rem;
}

.nav a:hover {
  color: white;
}

.btn-nav {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-nav:hover {
  background: var(--primary-blue-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  transition: all 0.3s ease;
}

.lang-switch:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ========================================
   ヒーローセクション
======================================== */
.hero {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--navy-blue) 50%, var(--primary-blue-dark) 100%);
  padding: 150px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(90deg, rgba(255,255,255,0.03) 0px, transparent 1px, transparent 50px, rgba(255,255,255,0.03) 51px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.03) 0px, transparent 1px, transparent 50px, rgba(255,255,255,0.03) 51px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: white;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  color: var(--accent-blue);
  position: relative;
  display: inline-block;
}

.hero-title .emphasis {
  background: linear-gradient(90deg, var(--accent-blue), #60A5FA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-reason {
  font-size: 1.3rem;
  color: #FFD700;
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--spacing-md);
  background: rgba(255, 215, 0, 0.1);
  border-left: 4px solid #FFD700;
  border-radius: 8px;
}

.hero-reason strong {
  color: #FFF;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--gray-200);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
}

/* Hero CTA Flow (2-step structure) */
.hero-cta-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-step {
  width: 100%;
  text-align: center;
}

.step-number {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: var(--accent-blue);
  padding: 0.3rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: 0.05em;
}

.cta-arrow {
  color: var(--accent-blue);
  font-size: 1.5rem;
  margin: var(--spacing-xs) 0;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

.cta-step .btn-primary {
  width: 100%;
  justify-content: center;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-blue-light);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 71, 171, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-color: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: white;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-2xl);
  justify-content: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-blue);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray-300);
  font-weight: 500;
}

/* ========================================
   セクション共通
======================================== */
section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-title .text-primary {
  color: var(--primary-blue);
}

.section-title .text-danger {
  color: var(--danger);
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--gray-600);
  max-width: 700px;
  margin: 0 auto;
}

/* ========================================
   問題提起セクション
======================================== */
.problem-section {
  background: white;
}

/* ========================================
   Fit（フィット）セクション
======================================== */
.fit-section {
  background: linear-gradient(180deg, white 0%, var(--gray-50) 100%);
  padding: var(--spacing-2xl) 0;
}

.fit-checklist {
  max-width: 900px;
  margin: 0 auto var(--spacing-xl);
}

.fit-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  background: white;
  border: 2px solid var(--gray-200);
  border-left: 4px solid var(--primary-blue);
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: all 0.3s ease;
}

.fit-item:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-xl);
  border-left-color: var(--accent-blue);
}

.fit-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.fit-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.fit-content p {
  color: var(--gray-600);
  line-height: 1.7;
}

.fit-cta {
  text-align: center;
  background: var(--primary-blue);
  border-radius: 12px;
  padding: var(--spacing-xl);
  color: white;
}

.fit-cta p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
}

.btn-fit {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: white;
  color: var(--primary-blue);
  padding: 1rem 2rem;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-fit:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

/* ========================================
   ベネフィット（3つの理由）セクション
======================================== */
.benefits-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.benefit-card {
  background: white;
  border: 3px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 8px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-blue), var(--accent-blue));
}

.benefit-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-blue);
}

.benefit-number {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 900;
  color: white;
  opacity: 0.15;
}

.benefit-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
  padding-right: 80px;
  line-height: 1.4;
}

.benefit-content h3 i {
  color: var(--primary-blue);
  margin-right: var(--spacing-xs);
}

.benefit-desc {
  color: var(--gray-700);
  line-height: 1.8;
  font-size: 1.05rem;
  margin-bottom: var(--spacing-md);
}

/* Pain → Solution structure */
.benefit-pain {
  color: var(--danger);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(239, 68, 68, 0.05);
  border-left: 3px solid var(--danger);
  border-radius: 8px;
}

.benefit-solution {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(0, 71, 171, 0.05);
  border-left: 3px solid var(--primary-blue);
  border-radius: 8px;
}

.benefit-solution strong {
  color: var(--primary-blue-dark);
  font-size: 1.1rem;
}

.benefit-detail {
  background: var(--gray-50);
  border-left: 3px solid var(--primary-blue);
  border-radius: 8px;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.benefit-detail p {
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: var(--spacing-xs);
}

.benefit-detail p:last-child {
  margin-bottom: 0;
}

.benefit-result {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.8;
  padding-top: var(--spacing-sm);
  border-top: 2px solid var(--gray-200);
}

.benefit-result strong {
  color: var(--primary-blue-dark);
}

/* ========================================
   緊急性セクション
======================================== */
.urgency-section {
  background: linear-gradient(135deg, var(--danger), #DC2626);
  padding: var(--spacing-2xl) 0;
  margin: var(--spacing-2xl) 0;
  border-radius: 12px;
  box-shadow: var(--shadow-xl);
}

.urgency-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  color: white;
}

.urgency-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.4;
}

.urgency-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  opacity: 0.95;
}

.urgency-content strong {
  color: #FFD700;
  font-weight: 700;
}

/* ========================================
   問題提起セクション
======================================== */
.problem-section {
  background: white;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.problem-card {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--danger), #FCA5A5);
}

.problem-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--danger);
}

.problem-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--danger), #FCA5A5);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  margin-bottom: var(--spacing-md);
}

.problem-badge {
  display: inline-block;
  background: var(--danger);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.problem-badge.urgent {
  background: var(--warning);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.problem-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.problem-card p {
  color: var(--gray-600);
  line-height: 1.7;
}

/* ========================================
   ソリューションセクション
======================================== */
.solution-section {
  background: linear-gradient(180deg, white 0%, var(--gray-50) 100%);
}

.solution-architecture {
  max-width: 900px;
  margin: 0 auto var(--spacing-2xl);
}

.arch-layer {
  background: white;
  border: 3px solid var(--primary-blue);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
  transition: all 0.3s ease;
}

.arch-layer:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-blue);
}

.layer-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 900;
  color: white;
}

.layer-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.layer-content h3 i {
  color: var(--primary-blue);
}

.layer-content p {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.layer-tech {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.tech-tag {
  background: var(--primary-blue);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.solution-result {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
  border-radius: 12px;
  padding: var(--spacing-xl);
  text-align: center;
  color: white;
}

.result-icon {
  font-size: 3rem;
  color: var(--success);
  margin-bottom: var(--spacing-md);
}

.solution-result h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.solution-result p {
  font-size: 1.1rem;
  line-height: 1.8;
  opacity: 0.95;
}

/* ========================================
   機能セクション
======================================== */
.features-section {
  background: white;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card.featured {
  border-color: var(--primary-blue);
  background: white;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.feature-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  flex-shrink: 0;
}

.feature-icon.primary {
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
}

.feature-icon.secondary {
  background: linear-gradient(135deg, var(--secondary-blue), var(--primary-blue-light));
}

.feature-icon.accent {
  background: linear-gradient(135deg, var(--accent-blue), #60A5FA);
}

.feature-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.2;
}

.feature-badge {
  display: inline-block;
  background: var(--primary-blue);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

.feature-purpose {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 71, 171, 0.05);
  border-left: 3px solid var(--primary-blue);
  border-radius: 4px;
}

.feature-desc {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: var(--spacing-sm) 0;
  color: var(--gray-700);
  line-height: 1.6;
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
  border-bottom: 1px solid var(--gray-200);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li i {
  color: var(--success);
  margin-top: 0.25rem;
  flex-shrink: 0;
}

/* ========================================
   活用事例セクション
======================================== */
.use-cases-section {
  background: var(--gray-50);
}

.use-cases-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.tab {
  background: white;
  border: 2px solid var(--gray-300);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  color: var(--gray-700);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.tab:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
}

.tab.active {
  background: var(--primary-blue);
  color: white;
  border-color: var(--primary-blue);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.use-case-content {
  background: white;
  border-radius: 12px;
  padding: var(--spacing-xl);
  border: 2px solid var(--gray-200);
}

@media screen and (max-width:768px){
  .use-case-content{
    padding: var(--spacing-sm);
  }
}

.use-case-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.use-case-header h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.urgency-badge {
  background: var(--danger);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
}

.urgency-badge.strategic {
  background: var(--primary-blue);
}

.urgency-badge.trust {
  background: var(--success);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.use-case-problem,
.use-case-solution {
  background: var(--gray-50);
  border-radius: 8px;
  padding: var(--spacing-lg);
}

.use-case-problem {
  border-left: 4px solid var(--danger);
}

.use-case-solution {
  border-left: 4px solid var(--success);
}

.use-case-problem h4,
.use-case-solution h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

.use-case-problem ul,
.use-case-solution ul {
  list-style: none;
}

.use-case-problem ul li,
.use-case-solution ul li {
  padding: var(--spacing-xs) 0;
  color: var(--gray-700);
  line-height: 1.7;
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
}

.use-case-problem li i {
  color: var(--danger);
  margin-top: 0.25rem;
}

.use-case-solution li i {
  color: var(--success);
  margin-top: 0.25rem;
}

.use-case-result {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
  border-radius: 8px;
  flex-wrap: wrap;
}

.result-metric {
  text-align: center;
  color: white;
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.metric-label {
  font-size: 0.9rem;
  opacity: 0.9;
}

.metric-note {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--spacing-xs);
  line-height: 1.4;
  font-weight: 400;
}

/* ========================================
   Metrics Section (独立セクション)
   ======================================== */

.metrics-section {
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(135deg, rgba(0, 71, 171, 0.05), rgba(0, 123, 255, 0.05));
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.metric-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.metric-icon {
  font-size: 2rem;
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

.metric-card .metric-value {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary-blue);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.metric-card .metric-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.metric-card .metric-note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: var(--spacing-sm);
}

/* ========================================
   技術基盤セクション
======================================== */
.technology-section {
  background: white;
}

.tech-highlight {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
  border-radius: 12px;
  padding: var(--spacing-xl);
  text-align: center;
  color: white;
  margin-bottom: var(--spacing-2xl);
}

.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(255, 255, 255, 0.2);
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  backdrop-filter: blur(10px);
}

.tech-highlight p {
  font-size: 1.1rem;
  line-height: 1.8;
  opacity: 0.95;
  max-width: 800px;
  margin: 0 auto;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.tech-card {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
}

.tech-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-blue);
}

.tech-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  margin-bottom: var(--spacing-md);
}

.tech-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.tech-card p {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.tech-specs {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.tech-specs span {
  background: var(--primary-blue);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ========================================
   料金セクション
======================================== */
.pricing-section {
  background: var(--gray-50);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.pricing-card {
  background: white;
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-xl);
  transition: all 0.3s ease;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border-color: var(--primary-blue);
  border-width: 3px;
  transform: scale(1.05);
}

.pricing-badge-featured {
  position: absolute;
  top: -15px;
  right: 20px;
  background: var(--primary-blue);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.pricing-header h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.pricing-purpose {
  font-size: 1rem;
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 71, 171, 0.05);
  border-radius: 8px;
  border-left: 3px solid var(--primary-blue);
}

.pricing-badge {
  display: inline-block;
  background: var(--gray-200);
  color: var(--gray-700);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.pricing-price {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg) 0;
  border-top: 2px solid var(--gray-200);
  border-bottom: 2px solid var(--gray-200);
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-600);
  vertical-align: top;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary-blue);
  line-height: 1;
}

.price-period {
  font-size: 1.2rem;
  color: var(--gray-600);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-lg);
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  color: var(--gray-700);
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
  line-height: 1.6;
}

.pricing-features li i {
  color: var(--success);
  margin-top: 0.25rem;
}

.pricing-features li.feature-note {
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 0.9rem;
  border-top: 2px solid var(--gray-200);
  padding-top: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.pricing-features li.feature-note i {
  color: var(--primary-blue);
}

.btn-pricing {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--gray-200);
  color: var(--gray-700);
  padding: var(--spacing-md);
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-pricing:hover {
  background: var(--gray-300);
  transform: translateY(-2px);
}

.btn-pricing.primary {
  background: var(--primary-blue);
  color: white;
}

.btn-pricing.primary:hover {
  background: var(--primary-blue-light);
}

.pricing-note {
  background: white;
  border: 2px solid var(--info);
  border-radius: 8px;
  padding: var(--spacing-lg);
  text-align: center;
}

.pricing-note p {
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: var(--spacing-xs);
}

.pricing-note p:last-child {
  margin-bottom: 0;
}

/* ========================================
   CTAセクション
======================================== */
.cta-section {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--navy-blue) 50%, var(--primary-blue-dark) 100%);
  padding: var(--spacing-2xl) 0;
  text-align: center;
  color: white;
}

.cta-urgency {
  font-size: 1.3rem;
  color: #FFD700;
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--spacing-md);
  background: rgba(255, 215, 0, 0.1);
  border-left: 4px solid #FFD700;
  border-radius: 8px;
  margin-bottom: var(--spacing-xl);
}

.cta-urgency strong {
  color: #FFF;
  font-weight: 700;
}

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: var(--spacing-md);
}

.cta-content p {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-button-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.cta-hint {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  text-align: center;
  font-weight: 400;
  line-height: 1.4;
}

.btn-cta-primary,
.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 1.2rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-cta-primary {
  background: white;
  color: var(--primary-blue);
}

.btn-cta-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

.btn-cta-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 2px solid white;
  backdrop-filter: blur(10px);
}

.btn-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ========================================
   お問い合わせセクション
======================================== */
.contact-section {
  background: white;
}

.contact-grid {
  /*display: grid;*/
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.contact-info h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--primary-blue);
  width: 30px;
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.contact-item p,
.contact-item a {
  color: var(--gray-600);
  text-decoration: none;
  line-height: 1.6;
}

.contact-item a:hover {
  color: var(--primary-blue);
}

.contact-highlights {
  background: var(--gray-50);
  border-radius: 8px;
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.contact-highlights h4 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
}

.contact-highlights ol {
  padding-left: var(--spacing-md);
  color: var(--gray-700);
  line-height: 2;
}

.contact-form-container {
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  padding: var(--spacing-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
}

.required {
  color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-md);
  border: 2px solid var(--gray-300);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 71, 171, 0.1);
}

.btn-submit {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  transition: all 0.3s ease;
}

.btn-submit:hover {
  background: var(--primary-blue-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ========================================
   フッター
======================================== */
.footer {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--navy-blue) 100%);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand p {
  color: var(--gray-300);
  margin-top: var(--spacing-sm);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.footer-section h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer-section a,
.footer-section p {
  display: block;
  color: var(--gray-300);
  text-decoration: none;
  margin-bottom: var(--spacing-xs);
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--gray-400);
}

.footer-enterprise-link {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-enterprise-link a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s ease;
  opacity: 0.7;
}

.footer-enterprise-link a:hover {
  color: var(--gray-400);
  opacity: 1;
}

.footer-enterprise-link i {
  font-size: 0.8rem;
}

/* ========================================
   レスポンシブデザイン
======================================== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .nav {
    position: absolute;
    top: 50%;
    right: var(--spacing-md);
    transform: translateY(-50%);
    gap: 0;
  }
  
  .nav a:not(.lang-switch) {
    display: none;
  }
  
  .lang-switch {
    display: flex;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .use-cases-tabs {
    flex-direction: column;
  }
  
  .tab {
    width: 100%;
  }
}